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What is Internet

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  1. 1. Requirement to use Internet facility <ul><li>A computer along with a fast Microprocessor having atleast 256 MHz speed, </li></ul><ul><li>Hard disk 20 gb </li></ul><ul><li>GUI base operating system – windows 98/2000 </li></ul><ul><li>Modem speed 56 kbps </li></ul><ul><li>Telephone connection </li></ul><ul><li>Multimedia system </li></ul><ul><li>ISP </li></ul>
  2. 2. MODEM <ul><li>Modem (Modulator-Demodulator) is a device, which helps in converting analog signal into digital signal and vice-versa.It may be either an internal or external modem but it is one of essential component to access the Internet.The computer uses or understands digital signals whereas telephone works on analog signals .So a modem allows your computer to connect with other computers around the world through telephone </li></ul>
  3. 3. SERVER <ul><li>All related data or contents of the Internet are held by the host computer known as Server. Any organization or corporation can own a Server. When any user requests for some information,it transmits the data in small packets along with the address of the user, I.e., where they are to be sent. </li></ul>
  4. 4. WWW(World Wide Web) <ul><li>The World Wide Web is a collection of pages of information on different topics on the Internet.These pages may include texts,images,sounds and digital movies, which can be accessed by the people all over the world. All the information is presented in a very attractive and entertaining way. </li></ul>
  5. 5. Webpage <ul><li>A single digital page of information which contains text,graphics, audio and video clipping on a website is called webpage. The pages,which collectively form the world wide web are known as web pages.The web pages are created on special type of host computer called web server. </li></ul>
  6. 6. Website <ul><li>A website is a collection of one or more related web pages,linked to one another to form a global web of information.When you want to move from one page to another on a website then you are to use hyperlinks. </li></ul><ul><li>Suppose, you want to get some information about some topic in physics the you should open educational website( </li></ul>
  7. 7. Homepage <ul><li>This is the first page which appears on the screen as soon as you open a website. Let us look at the home page of . </li></ul><ul><li>It is the first hyperlinks document displayed when the user first connects to any websites on the web server.It is generally an index page of any organization or information resource.The home page acts as the various link texts,which takes the user to further information on the same topic </li></ul>
  8. 8. URL(Universal Resource Locator) <ul><li>Every page on the Internet has a unique address through which it is called.The address of a web page is called the URL </li></ul><ul><li>URL of some website address </li></ul><ul><li>http:/ </li></ul><ul><li>http:/ </li></ul>
  9. 9. http:// <ul><li>http - protocoll </li></ul><ul><li>www - Web </li></ul><ul><li> host, </li></ul><ul><li>.com- types of site </li></ul><ul><li> - domain </li></ul>
  10. 10. Protocol <ul><li>Mots web addresses began with http:// (hyper text transmission protocol) This protocol transmits web pages over the Internet.The letters http are always followed by a colon(: and two forward slashes(//) </li></ul>
  11. 11. Host,Type <ul><li>This is the name of the website </li></ul><ul><li>.com – commercial sites </li></ul><ul><li>.gov- government organizations </li></ul><ul><li>.org –non-profit organization </li></ul><ul><li>.edu- educational institutions </li></ul><ul><li>.net – large networds. </li></ul>
  12. 12. Hyperlinks <ul><li>A hyperlink is a hot spot on q web page.It is a short cut method to another web page. Hyperlink allow visiting websites/web page to which it is linked without typing new address each time. </li></ul>
  13. 13. Web Browser <ul><li>A web browser is software that acts as an Interface between the user and the Internet . A browser helps in following ways. </li></ul><ul><li>It contacts the Web server and sends a request for information </li></ul><ul><li>It receives the information and displays it on the user’s computer. </li></ul><ul><li>Internet Explorer,Netscape Navigator </li></ul>
  14. 14. Search Engines <ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul>
  15. 15. HTML ( HYPER TEXT MARKUP LANGUAGE ) <ul><li>It is an encoding scheme,which is basically used to create the web document on the web servers.It is a versatile computer language used in the field of Internet technology to create and design a web page. </li></ul>
  16. 16. HTTP (Hyper Text Transfer Protocol) <ul><li>It is a set of rules or protocols, whioch is responsible for the transfer of hyper text documents between two or more computers.The information on a Word Wide Web is transmitted with the help of http. </li></ul>
  17. 17. Access to Internet <ul><li>To access the Internet, a user needs communication software such as the ISP(Internet Service Provider). </li></ul><ul><li>VSNL(Videsh Sanchar Nigam Limited) </li></ul><ul><li>Stayam </li></ul>
  18. 18. Two types connection <ul><li>Dial up connections- we can connect to the Internet with the help of a Modem and a telephone line. We cannot to an ISP just by dialing, </li></ul><ul><li>SLIP/PPP-The SLIP(Serial Line Internet Protocol) and PPP(Point to Point protocol),which are collectively known as IP accounts/address.The service provider has direct access to the Internet assign address to the users. </li></ul>
  19. 19. Electronic Mail <ul><li>E-mail is the process of sending messages electronically using your computer over a computer network.E-mail can be sent to any part of the world using Internet. </li></ul><ul><li>E-mail facility proveide free website </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul>
  20. 20. Advantages of e-mail <ul><li>E-mail messages can be sent instantaneouslyunlike the conventional postal system. </li></ul>